“William Mattar is a leading New York motor vehicle accident lawyer whose career reflects an unwavering commitment to results, accessibility and community service. By focusing exclusively on auto-related injury claims, he has built a proven record of recovery while guiding thousands of clients through difficult moments with clarity, compassion and trust.”

Fantastic Lawyers® Editorial, 2026

William Mattar is a leading New York personal injury lawyer and the founder of William Mattar Law Offices. Serving clients across New York State, William is widely known for his exclusive focus on motor vehicle accident cases and his long-standing commitment to helping injured people rebuild their lives after serious accidents.

Inspired at a young age by watching his father practise law in western New York, William knew early on that becoming a lawyer was his calling. That early sense of purpose has shaped a legal career built on advocacy, service and accessibility for everyday people.

What William Mattar Does

William focuses his practice exclusively on personal injury cases arising from motor vehicle accidents. He represents individuals and families injured in car, truck and motorcycle accidents, as well as pedestrians, cyclists and victims of emerging vehicle technologies.

His firm has helped thousands of clients across New York, handling cases from initial investigation through settlement or litigation, always with a clear focus on securing fair compensation and reducing stress for injured clients.

Why He’s Different

William Mattar has built one of New York’s most recognisable personal injury practices by combining scale with a client-first mindset. His firm operates on a no-fee-until-we-win basis and is structured to keep clients informed, supported and respected throughout the legal process.

By narrowing his focus to motor vehicle accidents, William has developed deep, practical knowledge of how these cases are evaluated, defended and resolved, allowing his team to pursue results efficiently and confidently.

Practice Areas

• Car Accidents
• Truck Accidents
• Motorcycle Accidents
• Wrongful Death
• Bicycle Accidents
• Pedestrian Accidents
• Distracted Driving Accidents
• Rideshare Accidents
• Self-Driving Car Accidents
• Motor Vehicle Product Liability

Experience & Track Record

• Founded William Mattar Law Offices in 1990
• Nearly $1 billion recovered for injured clients
• 2,500+ clients served
• 3,000+ five-star client reviews
• No fee unless compensation is recovered

Community Involvement

William’s commitment to service extends beyond the courtroom. An Eagle Scout, he has remained actively involved with the Boy Scouts of America for decades and has chaired the Greater Niagara Frontier Council’s annual fundraising dinner since 2002. He is also deeply involved in church and community organisations throughout western New York.

Outside work, William enjoys spending time with his family, cooking, hiking and supporting scouting activities alongside his sons.

Client Trust & Reviews

William Mattar is rated 4.8 stars across more than 1,500 client reviews. Clients consistently praise the firm’s communication, professionalism and compassion, as well as the team’s ability to guide them confidently through difficult and stressful situations.

Location & Contact

William Mattar serves clients throughout New York and is currently accepting new cases.

Phone: (716) 444-4444 Office: 6720 Main Street, Suite 100, Williamsville, NY 14221